Permanent waving apparatus



March 26, 1935. D. LAKENBACH PERMANENT WAVING APPARATUS Origifial Filed Aug. .18, 1953 W T4 N NE R E 0 m 1 A A p a M fl D.

Patented Mar. 26, 1935 ,6 8

UNITED STATES PATENT OFFICE PERMANENT WAVING APPARATUS Daniel Lakenbach, Valley Cottage, N. Y.

Originalapplication August 18, 1933, Serial No. 685,684. Divided and this application April 30, 1934, Serial No.'723,021

3 Claims. (Cl. 219-24) The invention relates to an apparatus to be used through both bores 41 and 42 in the lava rod 43 in imparting a so-called permanent wave to huand are joined at the upper extremity of the lava man hair. More particularly the invention rerod, for instance, by twisting, a sealing element lates to a heating unit of novel construction. 44 of an insoluble material, for instance, porcelain,

5 The present application is a division of my being applied over the joined ends of the coiled 5 application, Serial No. 685,684, filed August 18, resistance to secure amoisture and air-tight seal- 1933, Patent No. 1,968,773, July 31, 1934. ing. The lower extremity of the lava rod is cut The primary object of the invention is to proaway, as shown at 45, so as to leave a tongue or vide an internal heating unit which is adapted to separating wall 46 projecting beyond the cut-away be removably inserted into a curling rod or manends of the lavarod. The ends of the lead cores 10 drel provided with an axial bore to receive such 38 and 39 are then joined to the free ends of the heating unit. coiled resistance element 40, asbestos being ap- Various other objects and the advantages flowplied within the upper portion of the recess 47 ing therefrom will be apparent in com'unction with and there held in place by a sealing material. A

the following description of my novel device. brass washer 48 is then put in place by a press 15 In the accompanying drawing forming part of fit so as to seal the recess 47, a few of the turns this specification I have shown a particular emof the spring 49 above the washer being larger bodiment of my invention by way of illustration than the remaining turns of the spring so as rather than by way of limitation. In such drawnot to pull through the washer. In this manner ing the spring is securely anchored in the washer. 20

Fig. 1 is a plan view of my novel removable It will be noted that the outer shell 33 is circuminternal heating unit; ferentially flared at the bottom extremity thereof Fig. 2 is a longitudinal section through the as at 50 so as to securely fasten such shell within heater unit; the pull knob 36. Preferably a flat surface is also Fig. 3 is a section on the line l1-11 of Fig. 2; ground on one side of the flared end 50 of the 25 and shell 33 so as to prevent the turning of such shell Fig. 4 shows my novel heating unit inserted in within the pull knob in which it has been anchored. the bore of a spiral curling rod with the latter ap- It will be noted from Fig. 2 that the lava rod plied to a protector. 43 when inserted into the heater shell 33 stops Referring more particularly to the drawing, in short of the end thereof, thereby providing an air 30 which similar reference characters identify simgap Which serves to p the Protector c001 a ilar parts in the several views, my novel removacting as an insulating p (1 t0 the fact a able internal heating unit, adapted for use with a there is no transfer of heat by conduction through Croquignole curling rod or with a spiral rod, the upper open end of the shell 33.

consists in an outer shell 33 of metal or similar The removable internal heating unit just de- 35 heat-conducting material, having an expansion scribed is adapted for use not only with the end 34 formed by longitudinal slits 35 provided at curling rod employed in the Croquignole method opposite faces of the shell. The purpose of providof permanent waving, particularly shown and ing this type of expansion end is to obtain the described in my copending application above renecessary friction, when the heating unit has ferred to, but also for use with the spiral method, been inserted into the bore of the curling rod, to its application to the latter method being illusretain the heating unit practically at any depth trated in Fig. 4. While the identical form of within the curling rod. A pull knob 36 of a heat heating unit is utilized in carrying out such methresisting material, such as a phenolic condensation 0d, the curling rod is necessarily of different conproduct and preferably provided with a knurled struction, comprising the rod 51 having an axial 45 surface 37, is fixed to the outer end of the heating bore 52 to accommodate the heating unit and a.

unit within which the lead cords 38, 39 terminate. head 53 rotatable in one direction and applied The heating element of my novel heating unit to the protector 54 of the type shown and decomprises a coiled resistance 40 housed within scribed in my application Serial No. 674,786, filed two parallel bores 41, 42 in a rod 43 which is se- June 8, 1933. Riding over the curling rod is a cured within the heater shell 33. The rod 43 is butterfly clamping element 55 which may be used made of a highly heat-resistant or refractory mato tighten the tress 56 about the curling rod after terial, for instance, that known as lava. such tress has been wound thereon in the well- The assembly of the heating unit is as follows: known manner.

55 The coiled resistance elements 40 are passed While I have described a specific embodiment of my invention, it is obvious that various modifications therein, particularly in the configuration and arrangement of the various parts may be made without departing from my invention.

I claim: 7

1. An internal heating unit for use in permanent waving, adapted to be removably inserted within a curling rod, comprising an outer shell, an inner rod having a plurality of bores running the length thereof, a heating element comprising a coiled resistance extending through said bores, a pull knob within which said outer shell is anchored and lead cords connected to the free ends of said heating element and anchored within said pull knob.

2. An internal heating unit for use in permanent waving, adapted to be removably inserted Within a curling rod, comprising an outer shell having an expansible end, an inner rod of a refractory material having a plurality of bores running the length thereof, a heating element comprising a coiled resistance extending through said bores, a pull knob within which said outer shell is anchored and lead cords connected to the free ends of said heating element and anchored within said pull knob. 1

3. An internal heating unit for use in permanent waving, adapted to be removably inserted within a curling rod, comprising an outer shell, an inner rod having a plurality of bores running the length thereof, a heating element comprising a coiled resistance extending through said bores,

joined and sealed together at one end of said 

